/*******************************************************************************
 * Copyright 2012 Steven Rudenko
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package com.anxpp.blog.fragment;

import com.anxpp.blog.R;

import android.annotation.SuppressLint;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;

public class WebViewFragment extends Fragment {
	public final static String TAG = WebViewFragment.class.getSimpleName();

	private WebView viewContentWebView;
	private String url;

	private boolean resetHistory = true;

	@SuppressLint("SetJavaScriptEnabled")
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		final View v = inflater.inflate(R.layout.webview, container, false);

		final ProgressBar viewContentProgress = (ProgressBar) v.findViewById(R.id.progress);
		viewContentWebView = (WebView) v.findViewById(R.id.webview);
		viewContentWebView.getSettings().setJavaScriptEnabled(true);
		viewContentWebView.setWebViewClient(new WebViewClient() {
			@Override
			public boolean shouldOverrideUrlLoading(WebView view, String url) {
				return super.shouldOverrideUrlLoading(view, url);
			}
		});
		viewContentWebView.setWebChromeClient(new WebChromeClient() {
			@Override
			public void onProgressChanged(WebView view, int newProgress) {
				viewContentProgress.setProgress(newProgress);
				viewContentProgress.setVisibility(newProgress == 100 ? View.GONE : View.VISIBLE);

				if (newProgress == 100 && resetHistory) {
					viewContentWebView.clearHistory();
					resetHistory = false;
				}
			}
		});
		return v;
	}

	@Override
	public void onViewCreated(View view, Bundle savedInstanceState) {
		super.onViewCreated(view, savedInstanceState);
		reload();
	}

	@Override
	public void onHiddenChanged(boolean hidden) {
		super.onHiddenChanged(hidden);
		if (hidden)
			viewContentWebView.stopLoading();
		else
			reload();
	}

	public void setUrl(String url) {
		this.url = url;

		if (viewContentWebView != null)
			viewContentWebView.stopLoading();

		resetHistory = true;
	}

	public void reload() {
		if (TextUtils.isEmpty(url))
			return;

		viewContentWebView.loadUrl(url);
	}

	public boolean onBackPressed() {
		if (viewContentWebView.canGoBack()) {
			viewContentWebView.goBack();
			return true;
		}
		return false;
	}
}
